Use the table. What inference can you make by comparing the measures of variability? Use the drop-down menus to explain your answer.
Finish Times of 30 Runners
in the 100-meter Dash
Mean MAD
Last Year 16.2s 1.2
This Year 14.7s 1.9
The is greater for this year’s 100-meter dash, which suggests that all 30 students equally.
Answers
Answer:
The first one is mean absolute deviation and the second one is did not improve
Step-by-step explanation:
I took the test
The MAD is greater for this year’s 100-meter dash, which suggests that all 30 students did not improve equally.
What is Mean?The sum of all values divided by the total number of values determines the mean (also known as the arithmetic mean, which differs from the geometric mean) of a dataset. The term "average" is frequently used to describe this measure of central tendency.
The given table is:
Mean MAD
Last Year 16.2 s 1.2
This Year 14.7 s 1.9
Looking at this table we can see that this year, the meantime is smaller than the one from last year, so the runners are faster on average.
The mean absolute deviation is bigger, but the change in the mean is bigger.
difference of the mean 16.2 - 14.7 = 1.5
difference of the MAD 1.9 - 1.2 = 0.7
This means that the average speed of the runners increased since last year,
and the fact that the MAD increased means that not all the runners increased their speed at the same rate, so now the speeds of the different runners are not as alike as last year.
Learn more about Mean here:
https://brainly.com/question/521501
#SPJ3
Related Questions
Georgie put $500 in her savings account, earning interest at a rate of 4% each year. She did not make any more deposits or withdrawals. a) How much money was in the account after one year? b) How much money was in the account after 4 years? c) Was the amount of money earned in interest the same or different each year?
Answers
Answer:
a) $520
b) $580
c) Interest amount is same each year
Step-by-step explanation:
Given - Georgie put $500 in her savings account, earning interest at a rate of 4% each year. She did not make any more deposits or withdrawals.
To find - a) How much money was in the account after one year?
b) How much money was in the account after 4 years?
c) Was the amount of money earned in interest the same or different each year?
Proof -
Here given that,
Principal amount = $500
rate of interest = 4% = 4/100 = 0.04
Now,
a)
Amount = P [ 1 + RT ]
= 500 [ 1 + 0.04(1)]
= 500 [ 1 + 0.04] = 520
⇒Amount = $520
b)
Amount = P [ 1 + RT ]
= 500 [ 1 + 0.04(4)]
= 500 [ 1 + 0.16] = 580
⇒Amount = $580
c)
In 2nd year,
Amount = P [ 1 + RT ]
= 500 [ 1 + 0.04(2)]
= 500 [ 1 + 0.08] = 540
⇒Amount = $540
Now,
Interest in 1st year = 520 - 500 = 20
Interest in 2nd year = 540 - 520 = 20
So,
The interest amount is same each year
Jerome discovered he had made an error when he measured one of the feathers. Which data value could be the error? Explain
Answers
Answer:
3/4
Step-by-step explanation:
From the plotted number line :
The Outlier value can be determined :
Q1 = 0.25(n+1)th term
Q1 = 0.25(21)th term = 5.25th = (2 1/4 + 2)/2 = 2.125
Q3 = 0.75(21)th term = 15.75th = 2 1/2
IQR = Q3 - Q1 = 2.5 - 2.125 = 0.375 = 3/8
Q1 - 1.5(IQR) = 2.125 - (1.5*0.375) = 1.5625
Q3 - 1.5(IQR) = 2.5 + (1.5*0.375) = 3.0625
Hence, Outlier values will be :
Values < 1.5625 and
Values > 3.0625
The Outlier value in the data is 3/4
2. The store bought a pair of shoes for $60, and sold
it for $100. What percentage was the markup?
Answers
Answer:
33.3%
Step-by-step explanation:
Given data
Cost of shoes= $60
Selling price = $100
% markup = (selling-cost/cost)*100
% markup = (100-75/75)*100
% markup = (25/75)*100
% markup = (0.33333333333)*100
% markup =33.3%
Hence the markup is 33.3%
Need help with the answer please
Answers
Please someone help I really need it and please answer if you can give me the answer I will give brainleast just please help me with this
Answers
Answer: I tried to use the step by step explanation of your exercise, I hope Otis helping you and have a nice rest of your day :)
Dakota makes a salad dressing by combining 6 1/3 fluid ounces of oil and 3 3/8 fluid ounces of
vinegar in a jar. She then pours 3 1/4 fluid Ounces of the dressing onto her salad.
How much dressing remains in the jar?
Answers
Answer:
6 11/24
Step-by-step explanation:
Do that on any calculator and it'll be that (also, if you have any other questions like that, I recommend MathPapa
30 POINTS!
Find the value of x. The polygons are similar, but not neccesary drawn to scale.
Answers
Answer:
x = 8
Step-by-step explanation:
x=8
32/24=1 1/3
16/12=1 1/3
(y+1)/21=1 1/3 --> 26 is y
(x-1)/6=1 1/3 --> 7=(x-1) so 8-1=7 so x=8
HOPE THAT HELPS! :)
Natalia is was paying $165 for her cell phone plan with Sprint. She found a better deal with AT&T and switched companies and now pays $129. What is her percent savings to the nearest percent?
Answers
if a whole pizza has 2400 calories how many calories would you eat if you ate 5/6 of the pizza?
Answers
Answer:
2000 calories
Step-by-step explanation:
2400 / 6 = 400 calories per 1/6 of pizza
400 * 5 = 2000
I forgot how to do this
Answers
It‘s simply one side times the other side.
In your task this would be:
4ft x 13ft = 52 square ft
Now you have to calculate the area of the triangle. The formula for this is: Height x Length of the base x 1/2
So in your task this would be:
7ft x 5ft x 1/2 = 17.5 square ft
(you get the 7ft by subtracting 6ft from 13ft, which results in the height of the triangle)
Now you just add those two surfaces areas together:
52 square ft + 17.5 square ft = 69.5 square ft
For every rider picked up, Uber charges a $5.50 fee plus $0.35 per mile. Write the linear function that represents the total cost of an Uber ride for any number of miles
Answers
Answer:
Y =0.35x
Step-by-step explanation:
You know you have to pay the 5.50 so that isn't going to change so that'd cleared up. Next .35 is multiplied every mile they drive
I WILL MARK SOMEONE BRIANLIEST!!! SOMEONE HELP
Answers
Answer:
See below
Step-by-step explanation:
[tex] \because \: we \: know \: that \\ {2}^{0} = 1 \\ \\ \implies \: log_{2}1 = 0 \\ (if \: {a}^{m} = n \implies \: log_{a}n = m)[/tex]
ill give brainlist if your correct
Answers
Answer:
I KNOW this is not an awnser but im doing the same things as you for summer school help me i help you?????
Step-by-step explanation:
pls also i think it is like c I dont know thou
HURRY I WILL GIVE 100 pointssss!!!
A climber is on a hike. After 4 hours he is at an altitude of 800 feet. After 12
hours, he is at an altitude of 1400 feet. What is the average rate of change? *
Answers
Answer:
First Problem: 200 ft/hour Second Problem: 3 ft/hour
Step-by-step explanation:
R = D/T
So, 800/4=200
We will check if the rate matches for the second example rate:
1400/12=200. It does, so we know we are correct
Problem 2:
R = D/T
90/30=3
Hope it helps.
Wanna be the Brainiest
Answers
Answer:
156cm^3
Step-by-step explanation:
V= 1/2 a*c*h
a=3
c=8
h=13
3*8*13=312
312/2=156
Gabriel brings 25 cupcakes to share with his classmates at school. At the end of the day, he has 3 cupcakes remaining. What percent of the total cupcakes did Gabriel share with his classmates?
A 12%12%
B 22%22%
C 75%75%
D 88%
Answers
Answer:
[tex]88 \\ \\ \\ 25 - 3 = 22 \\ 22 \div 25 \times 100 = 88\%[/tex]
If you make it into an easier number to work with like 100 you get that he brought 100 cupcakes to school and brought home 12. That means he brought home 12% of the cupcakes 100%-12% is 88% which is the amount he shared at school.
pls answer asap!!ty!!
Please label the missing angles below.
Answers
Answer:
Triangle A: 38 degrees
Triangle B: Unknown (not enough information)
Triangle C: Unknown (not enough information)
Triangle D: 70 degrees
Triangle E: 40 degrees
Step-by-step explanation:
Work for Triangle A: 90 + 52 = 142. 180 - 142 = 38.
Work for Triangle B: Unidentifiable because there is no indicator to tell you if any of the angles/lines are equal. Generally there will be a "double lined" indicator in the corners of which a triangles angles are equal.
Work for Triangle C: Same as B.
Work for Triangle D: 90 + 20 = 110. 180 - 110 = 70.
Work for Triangle E: 90 + 50 = 140. 180 - 140 = 40.
Plzz help I'LL GIVE BRAINLIEST AND 100 POINTS
Answers
Answer:
6th graders have more participators in extracurricular activities than 4th graders.
There are more 6th graders than 4th graders that participate in extracurricular activities.
Step-by-step explanation:
your answer for the first one. 6th graders have more than 4th gradersdoing activities.
your answer for the second one. There are more 6th graders than 4th graders that participate in extracurricular activities.
HELP ME PLEASE NEED HELP PLZZZZ
Answers
Find the perimeter of the window to the nearest tenth. 20cm
Answers
165.66371cm exact and 165.67 to 2d.p
20 + 20 = 40cm
2πr = 125.66371cm
125.66371cm + 40cm = 165.66371
Have a great day <3 (I'm happy)
Chad has 1.4 gallons of milk. There are about 3.79 liters in 1 gallon. How many liters of milk does Chad have?
A. 3.79
B. 5.31
C. 2.71
D. 0.37
Answers
Answer:
The answer is B. 5.31 gallons
Step-by-step explanation:
lord have mercy
please help me
Answers
Answer:
-24 and positive 2
Step-by-step explanation:
please hurry i have less than five minutes
Would you expect the line in the question described above (y=−9.25x−1.75y=−9.25x−1.75 ) would have a slope that points up and to the left or up and to the right? Why?
Answers
Answer:
Up and to the left.
Step-by-step explanation:
I checked it on desmos graphing calculator
You have 10 gallons of lemonade to sell. 1 gallon is approxiamately 3785 cm3. Each customer uses one paper cup as shown. Hay many paper cups will you need?
the cups a cone shape with the radius of 8 cm and the height or 11 cm
A. 205
B. 312
C. 544
D. 78
Answers
If x-1= k and k=3, what is the value of x
3
Answers
x-1=3
move 1 to the other side, making it positive
x=3+1
x=4
Answer:
x-1/3 = k where k=3
We must be happy enough to find the value of only one valuable here, that is, x.
therefore, x-1/3=3
To find what is x-1, all we need to do is,
Take the denominator of the fraction to the answer (3)and multiply them. (that's how you'll find the values in the numerator)
So, you'll get,
x-1=3*3
x-1=9
To find the value of x,
The other number (-1) should be taken to the answer (9)
(Remember that the sign changes when the number crosses the equals sign)
therefore,
x= 9 + 1 (-1 will turn to +1 on crossing the equal sign)
Therefore , by addition, normally,
you'll get x=10
Hope this helps:)
Write an expression for the operation described below. r times 10
Answers
Answer:
r * 10
Step-by-step explanation:
* stands for multiplying.
The triangles are congruent by SSS or HL.
Triangles M N Q and P Q N are connected at side Q N. Triangle M N Q is rotated about point N and then is shifted to the left to form triangle P Q N.
Which transformation(s) can map TriangleMNQ onto TrianglePQN?
translation only
reflection only
rotation, then reflection
rotation, then translation
Answers
Answer:
rotation, then translation
Step-by-step explanation:
The transformation that map triangle MNQ onto triangle PQN is rotation, then translation.
The given triangles;
Triangle MNQ Triangle PQNA translation of a triangle occurs when the triangle shifts up, or down, of left or right on the coordinate plane.
The reflection of a triangle occurs when the vertices of the triangle is flipped over the opposite side.
Since the triangle MNQ is rotated then shifted to the left to form the new triangle PQN, we can conclude that the transformation that map triangle MNQ onto triangle PQN is rotation, then translation.
Learn more about rotation and translation of triangles here: https://brainly.com/question/1616371
What is the distance between these two points: (1, 2) and (9, 8)?
Answers
Dab = square root of ( xa - xb )^2 + (ya - yb)^2
square root of (1 -9 )^2 + (2 - 8)^2
square root of (-8)^2 + (-6)^2
square root of 64 + 36
square root of 100
10 units
Which models represent the sum?
0.4 + 1.4
Answers
Answer:
I think it's the first one and the second one
please help me i dont know it
.
Answers
Answer:
c
Step-by-step explanation: